<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    let arr = ['red', 'green', 'blue']
    // arr.pop()  //blue
    // document.write(arr)
    // arr.shift() //red
    // document.write(arr)
    arr.splice(1, 1) //green
    document.write(arr)
  </script>
</body>

</html>